I do not think that you would get a good bang for the buck. The
equation might be a little different if you had a plasma cutter.

Take these garden tractor remnants and entrails, put in a open box,
and hope that scrap hunters pick them up. (usually works at my
house).

That will save you a great deal of money that you would spend on worn
out cutting blades, etc.

Use the savings to buy new 12 gauge steel.

i